Rotary gas pump



April 29, 1930.

|. c. JENNINGS ROTARY GA UMP Original Filed Sept. 4

. pumped and liquid,

Patented Apr. 29, 1930 UNITED STATES PATENT OFFICE ROTARY GAS PUMP Application filed September 4, 1924, Serial No. 735,937. Renewed January 24, 1928.

The object of this invention is to provide a new and improved rotary gas pump particularly adapted for putting gas such as air under pressure. The improvement relates particularly to a rotary gas pump employing a liquid as the motivating agent.

The principle of the invention is illustrated in the accompanying drawing forming a part of this application and in which the figure is a diagram illustrating the operation. The invention will be best understood from a detail description. 7

Referring to the drawing and in detail, A designates a casing, revolving in which is a rotor B, having peripheral displacement chambers C, formed by blades orpartitions. P designates an inlet-port for the gas to be P. an outlet port. These parts are arranged substantially as shown in patents to Lewis H. Nash, No. 953,222, patented March 29, 1910, and No. 1,091,529, patented March 31, 19M, except that the casing is made substantially concentric to the rotor. D designates a liquid exit pipe or passage for the which pipe or passage connects to a centrifugal liquid pump W The outlet of the centrifugal liquid pump is connected by a pipe or passage E to the casing A. The centrifugal pump and the rotor are revolved at high speed and preferably in substantial synchronism. In some cases, the centrifugal pump and the rotor may be mounted on the same shaft. By this rotation, the liquid will be withdrawn from the casing by the centrifugal pump, put under heavy pressure in the centrifugal pump'and then returned to pump around therein,

the casing. As the liquid leaves the rotor and passes out into the pipe D, the displacement chambers'will' be emptied and the gas-to be ed will enter the same through the inlet port P. The gas thus drawn into the displacement chambers then will be carried until the chambers become exposed to the pressure-of the liquid in the E. .When this takes place, the liquid Will'flow into the displacement chambers and put the gas therein under heavy pressure, and as the rotor continues its revolution the gas under this heavy pressure will be forced out through the outlet port P.

As the rotor continues its revolution, the liquid thus forced into the displacement chambers will be carried around until the chambers reach the exit pipe or passageD', when the liquid will be thrown or drawn out therefrom and then the cycle of operation will again be started.

It will be seen that the flow of the liquid putunder pressure by the centrifugal pump tends to help the revolution of the rotor.- It also will be seen that by properly designing the parts the gas to be pumped can efliciently be put under pressure. The drawing and disclosure herein is only diagrammatic. desired the apparatus can be arranged in one shell or casing and the rotor and pump combined to make up a simple self-contained unit. The details and arrangements herein shown and described may be greatly varied by a skilled mechanic without departing from the scope of the invention as expressed in the claims.

Having thus fully described my invention what I claim and desire to secure by Letters Patent is 1. A rotary gas pump employing a liquid as the motivating agent, comprising a casing, a rotor therein having peripheral displacement chambers, suitable ports for allowing the fluid to be pumped to enter and leave said chambers, a'pump i'orjorc'ing said liquid into said casing under pressure thereby to place a pressure on said fluid, and the pump.

2. A rotary gas pump employing a liquid as the motivating agent, comprising a casing, a rotor therein having peripheral displacement chambers, suitable ports for allowing the fluid to be pumped to enter and leave said a liquid return to chambers, and a pump connected to receive I said liquid from said casing and to force the same back into said casing under pressure thereby to force said fluid out of the chamber. 3. A rotary gaspump employing a liquid as the motivating agent, comprising a casing, a rotor therein having peripheral displacement chambers in which the fluid to be pumped is put under pressure, suitable ports for allowing the fluid to be pumped to enter and leave said chambers, a connection to said ment chambers,

' connection for allowing liquid to escape casing for allowing the liquid to pass peripherally into said displacement chambers, and

a pump for forcing liquid under pressure into said casing, and a liquid return to said pump.

4. A rotary gas pump employing a liquid as the motivating agent, comprising a casing, a rotor therein having-peripheral displacesuitable ports for allowing the fluid to be pumped to enter and leave said chambers, a connection to said casing for allowing liquid under pressure to enter there-. through peripherally into said chambers, a

peripherally from said displacement chambers through the casing, and a centrifugal pump for withdrawing-said liquid from said casing andfor forcing the same back into the D casing under pressure thereby to force said fluid out of the chamber. a

In testimony whereof I have hereunto affixed my signature.

IRVING C. JENNINGS. 

